This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


  • Unicode: 221A.
  • Alias: Esc sqrt Esc.
  • Prefix operator with built-in evaluation rules.
  • x is by default interpreted as Sqrt[x].
  • Ctrl+@, Ctrl+2 or \ yields a complete SqrtBox object.
  • \[Sqrt] is equivalent when evaluated, but will not draw a line on top of the quantity whose square root is being taken.